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(N5 Model.)

G. L. JAEGER.

LETTER ENVELOPE.

No. 365,260 I Patented June 21, 1887.

WITNESSES INT EN TOR Qvwsxw 13mg hi/flTToRivEys N PETERS Phom-Limo n nw,Wasmn mn. 11cv UNITED STATES ATENT OFFICE.

GUSTAV L. J AEGER, OF NEW YORK, N. Y.

LETTER-ENVELOPE.

SPECIFICATION forming part of Letters Patent No. 365,260, dated June 21,1887.

Application filed September 16, 1886. Serial No. 213,727. (No model.)

To aZZ whom. it may concern.-

Be it known that I, GUSTAV L. J AEGER, a citizen of the United States,residing at New York in the county and State of New York, have inventednew and useful Improvements in Letter-Envelopes, of which the followingis a specification.

My invention relates to improvements in letter-envelopes; anditconsists, essentially, in the combination, with a letter-sheet-,ofsat'etyflaps at the bottom of the sheet, a closing-flap at its top,and a gummed sealing-flap on one sideand adjacent to the closing flap,the sheet and flaps folding as hereinafter explained.

The invention is illustrated in the accompanying drawings, in whichFigure 1 represents a face view of the letter-envelope unfolded. Figs.2, 3, and 4 are similar views illustrating the successive steps taken infolding the sheet. Fig. 5 is a face view showing the sheet folded. Fig.6 is a longitudinal section in the plane as m, Fig. 5.

Similar letters indicate corresponding parts.

In the drawings, the letter A designates the letter-sheet, from whichproject thesafety-tlaps a c, the closing-flap b, and the sealing-flap c.In the example shown in the drawings the safety-flaps are located at thebottom of the sheet, the closing-flap at the top thereof, and thesealing-fiap on one side, all such fiaps extending from or nearly fromthe centers of the respective sides to the corners. The closing andsealing flaps b and c are on adjacent sides of the sheet and extend toone and the same corner.

In closing the sheet it is first folded along the line 1 1, Fig. l,which lies in the longitudinal center of the sheet, and then along theline 2 2, Fig. 2, which is in the transverse center. The safety-flaps aa are now bent or folded downward along the line 3 3, Fig. 3, and theflap a then overlaps the portion d of the edge of the sheet, and theflap aenibraces or falls over the flap a. The closing-flap b is bentdownward along the line 4 4, Fig. 1, into the position shown in Fig. 4,and then overlaps the safety-flaps and a portion of thesheet, Fig. 6. Tocomplete the envelope the sealing-flap is bent over in the line 5 5,Fig. 4, and overlaps aportion of the closing-flap and a portion of thesheet. This sealing-flap is properly gummed on its edge, or on a portionof such edge, so that it can be secured to the closingflap and to thesheet.whereb v the sheet or envelope is securely closed. When the sheetis open, the gumined seal-flap is on one side thereof, so that if thesheet is placed within a copying-book the sealing-flap is left toprotrude and the written matter can be copied, the gum on the seal-flapbeing outside of the copying-book. I

The letter-sheet can be formed without the safety-flap, if desired, thesheet being folded as before; but as the object of these flaps is toprevent the letter from being surreptitiously opened their use is ofgreat importance in most cases. \Nithout said flaps it might be possibleto draw downward the portions c e of the sheets which are not in contactwith the sealing-flap and to read the matter contained thereon. Sincethe safety flap a is folded over the edge d of the sheet and the flap aover flap a, and both are held down by the closing and sealing flaps, itis impossible to withdraw the portions 6 6 without tearing off ormutilating the safety-flaps or other portions of the sheet. Theletter-sheet can be easily and rapidly opened by severing the materialalong the bend of the sealing-flap.

It will be observed that the sheet presents its full and entire surfacetobe written upon, the various flaps all being exterior of the sheetproper.

What I claim as new, and desire to secure by Letters Patent, is-- Thecombination, substantially as shown and described, with a letter-sheet,of safetyflaps a a at the bottom of the sheet, a closingflap, b, at itstop, and a gummed sealing-flap, c, on one side and adjacent to theclosing-flap, the said sheet and flaps folding, as shown and described,to form the envelope.

In testimony whereof I have hereunto set my hand and seal in thepresence of two subscribing witnesses.

GUSTAV L. JAEGER. [n s] \Vitnesses:

W. HAUFF, E. F. Kas'rnnnnnnn.

